Final answer:
Physical properties, like boiling point, can be observed without changing the composition of matter. Unlike chemical properties, like reactivity and flammability, observing a physical property does not cause the substance to become a different material.
Step-by-step explanation:
In Chemistry, the properties that can be observed without changing the composition of matter are referred to as physical properties. Examples of physical properties include color, odor, melting point, hardness, density, and in this case, boiling point. Boiling point refers to the temperature at which a substance changes from a liquid to a gas. It is a physical property because observing it does not alter the substance’s composition. Characteristics such as flammability and reactivity are considered chemical properties because they describe how a substance can change into a different substance.
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